426 UR, A. FARRE ON THE STRUCTURE OF THE CILIOBRACHIATE POLYPI. 
Fig. 17 . b. Posterior view of flask-shaped body. 
Fig. 1 8 . b. Anterior ditto. (The cilia are not represented in these latter figures ; 
they are seen in fig. 7.) 
Fig. 19. a. Portion of recent arm. The cilia very numerous. 
b. c. The same when perishing. 
Fig. 20. X 40. a. Sac containing gemmules. 
b. Single gemmule in the act of swimming, with the cilia curved down- 
ward. 
c. The same viewed from above. The waves of cilia appearing as single 
cilia. 
Fig. 21. X 100. A gemmule seen from the under surface. The greater part of the 
cilia folded up. The muscular lobes shown. 
a. The cilia that have a distinct motion from the rest. 
Fig. 22. The same from above. The cilia as when slowly acting round the 
margin in waves. The muscular lobes more distinct. 
Fig. 23. The appearance of the cilia when in rapid action. 
Fig. 24. The same after forty-eight hours, when it has become fixed and the 
formation of the cell commenced. 
Plate XXVII. fig. 1 to 5. p. 412. 
Membranipora pilosa. 
Fig. 1. Three animals in different positions. A fourth growing at e. 
a. Anus. 
b. Margin of operculum. These were parasitic on the filaments sur- 
rounding the stem of Vesicularia spinosa. 
Fig. 2. Circumferential and tentacular canals. 
Figs. 3 and 4. Flask-shaped body. 
Fig. 6 to 9. p. 413. 
Notamia loriculata. 
Fig. 6. A branch of the natural size. 
Fig. 7- X 10. Portion of ditto. 
Fig. 8.X 100. a. Animal fully formed. Pylorus and rectal enlargement very distinct, 
the latter distended by feculent matter. 
b. Young animals. 
c. Buds yet homogeneous in texture. 
Fig. 9. Animals in different stages of protrusion. 
a. Horse-shoe aperture in membranous operculum. 
